package com.uacp.sgb.test.dialect;

import java.io.Serializable;
import java.sql.Types;

import org.hibernate.dialect.Dialect;
import org.hibernate.dialect.function.SQLFunctionTemplate;
import org.hibernate.dialect.function.StandardSQLFunction;
import org.hibernate.dialect.function.VarArgsSQLFunction;
import org.hibernate.type.StandardBasicTypes;

public class SQLiteDialect extends Dialect implements Serializable {

private static final long serialVersionUID = 1L;

public SQLiteDialect() {
    registerColumnType(Types.BIT, "integer");
    registerColumnType(Types.TINYINT, "tinyint");
    registerColumnType(Types.SMALLINT, "smallint");
    registerColumnType(Types.INTEGER, "integer");
    registerColumnType(Types.BIGINT, "bigint");
    registerColumnType(Types.FLOAT, "float");
    registerColumnType(Types.REAL, "real");
    registerColumnType(Types.DOUBLE, "double");
    registerColumnType(Types.NUMERIC, "numeric");
    registerColumnType(Types.DECIMAL, "decimal");
    registerColumnType(Types.CHAR, "char");
    registerColumnType(Types.VARCHAR, "varchar");
    registerColumnType(Types.LONGVARCHAR, "longvarchar");
    registerColumnType(Types.DATE, "date");
    registerColumnType(Types.TIME, "time");
    registerColumnType(Types.TIMESTAMP, "timestamp");
    registerColumnType(Types.BINARY, "blob");
    registerColumnType(Types.VARBINARY, "blob");
    registerColumnType(Types.LONGVARBINARY, "blob");
    registerColumnType(Types.NULL, "null");
    registerColumnType(Types.BLOB, "blob");
    registerColumnType(Types.CLOB, "clob");
    registerColumnType(Types.BOOLEAN, "integer");

    registerFunction("concat", new VarArgsSQLFunction(
            StandardBasicTypes.STRING, "", "||", ""));
    registerFunction("mod", new SQLFunctionTemplate(
            StandardBasicTypes.INTEGER, "?1 % ?2"));
    registerFunction("substr", new StandardSQLFunction("substr",
            StandardBasicTypes.STRING));
    registerFunction("substring", new StandardSQLFunction("substr",
            StandardBasicTypes.STRING));
}

public boolean supportsIdentityColumns() {
    return true;
}

/*
 * public boolean supportsInsertSelectIdentity() { return true; // As
 * specify in NHibernate dialect }
 */

public boolean hasDataTypeInIdentityColumn() {
    return false; // As specify in NHibernate dialect
}

/*
 * public String appendIdentitySelectToInsert(String insertString) { return
 * new StringBuffer(insertString.length()+30). // As specify in NHibernate
 * dialect append(insertString).
 * append("; ").append(getIdentitySelectString()). toString(); }
 */

public String getIdentityColumnString() {
    // return "integer primary key autoincrement";
    return "integer";
}

public String getIdentitySelectString() {
    return "select last_insert_rowid()";
}

public boolean supportsLimit() {
    return true;
}

protected String getLimitString(String query, boolean hasOffset) {
    return new StringBuffer(query.length() + 20).append(query)
            .append(hasOffset ? " limit ? offset ?" : " limit ?")
            .toString();
}

public boolean supportsTemporaryTables() {
    return true;
}

public String getCreateTemporaryTableString() {
    return "create temporary table if not exists";
}

public boolean dropTemporaryTableAfterUse() {
    return false;
}

public boolean supportsCurrentTimestampSelection() {
    return true;
}

public boolean isCurrentTimestampSelectStringCallable() {
    return false;
}

public String getCurrentTimestampSelectString() {
    return "select current_timestamp";
}

public boolean supportsUnionAll() {
    return true;
}

public boolean hasAlterTable() {
    return false; // As specify in NHibernate dialect
}

public boolean dropConstraints() {
    return false;
}

public String getAddColumnString() {
    return "add column";
}

public String getForUpdateString() {
    return "";
}

public boolean supportsOuterJoinForUpdate() {
    return false;
}

public String getDropForeignKeyString() {
    throw new UnsupportedOperationException(
            "No drop foreign key syntax supported by SQLiteDialect");
}

public String getAddForeignKeyConstraintString(String constraintName,
        String[] foreignKey, String referencedTable, String[] primaryKey,
        boolean referencesPrimaryKey) {
    throw new UnsupportedOperationException(
            "No add foreign key syntax supported by SQLiteDialect");
}

public String getAddPrimaryKeyConstraintString(String constraintName) {
    throw new UnsupportedOperationException(
            "No add primary key syntax supported by SQLiteDialect");
}

public boolean supportsIfExistsBeforeTableName() {
    return true;
}

public boolean supportsCascadeDelete() {
    return false;
}
}